Ecological monitoring of migration of technogenic radionuclides between abiotic components and aquatic plants in the ecosystem of the Kaniv reservoir

During the period of 2011–2018, average specific activity 90Sr in aboveground organs prairie cordgrass, submerged club-rush, common reed, and narrow-leaved cattail ranged from 1.5 to 14.0 Bq/kg, while 137Cs 3.1 165 Bq/kg. Over course study, a tendency towards decrease accumulation levels by hydrophytes was observed. The helophytes likely remained unchanged. In 2018, investigated plant species did not exceed maximum reference values for post-accidental period. However, cordgrass exceeded 13 times, 25, 3, 2 respectively. study period, radionuclide contamination higher aquatic plants Kaniv Reservoir predominantly formed 137Cs, accounting 75–90 % contamination. terms increasing different ecological groups were arranged following sequence: gelophytes < pleustophytes hydrophytes, indicating balanced radioecological state ecosystem Reservoir. This provides insights into over seven-year observed suggests potential improvement environmental conditions. findings also highlight significant contribution overall plants. sequential distribution based on reflects equilibrium within ecosystem. information contributes our understanding dynamics radiation impact Key words: activity, radionuclides, plants, monitoring, Reservoir, accumulation, values,